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`Docket No.: P190991US00
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`AMENDMENTS TO THE CLAIMS
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`This listing of claims replaces all prior versions of claims in the application.
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`Listing of Claims:
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`1. (Currently Amended) A secondary battery comprising:
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`a positive electrode;
`
`a negative electrode; and
`
`an electrolyte, wherein
`
`the positive electrode includes:
`
`a positive electrode current collector;
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`a positive electrode mixture layer including a positive electrode active material containing
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`a lithium transition metal oxide; and
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`a protective layer provided betweenthe positive electrode current collector and the positive
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`electrode mixture layer,
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`the protective layer includes inorganic compound particles, a conductive agent, and a
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`binder, and has a recessed structure where the positive electrode mixture layer 1s recessed into the
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`protective layer, and
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`a content of the binder is 1 mass % or more and 10 mass % or less based on the total amount
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`of the protective layer,
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`wherein a standard deviation o of a thickness distribution of the protective layer is +/- 0.5
`
`uum or more, and
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`wherein the positive electrode includes a region where the protective layer does not exist
`
`locally, and the positive electrode current collector and the positive electrode mixture layer are in
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`direct contact with each other in the region.
`
`
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`Application No.: 16/580,206
`
`Docket No.: P190991US00
`
`2. (Original) The secondary battery according to claim 1, wherein a density of the positive
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`electrode active material in the positive electrode mixture layer is 3.2 g/cm? or more.
`
`3. (Previously Presented) The secondary battery according to claim 1, wherein the standard
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`deviation o of the thickness distribution of the protective layer is +/- 1.0 um or more.
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`4. (Previously Presented) The secondary battery according to claim 1, wherein the standard
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`deviation o of the thickness distribution of the protective layer is 30% or more and 50% orless
`
`based on an average thickness of the protective layer.
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`5. (Original) The secondary battery according to claim 1, wherein the protective layer has an
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`average thickness of 3.5 um orless.
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`6. (Original) The secondary battery according to claim 1, wherein the inorganic compound
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`particles have a shape formed by connecting a plurality of primary particles.
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`7. (Canceled)
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`8. (Original) The secondary battery according to claim 1, wherein the inorganic compound
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`particles are particles composed of o-alumina.
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`9. (Original) The secondary battery according to claim 1, wherein the positive electrode active
`
`
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`Application No.: 16/580,206
`
`Docket No.: P190991US00
`
`material is a lithium nickel composite oxide.
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`10. (Previously Presented) The secondary battery according to claim 1, wherein a total area of
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`regions where a thickness of the protective layer is 0.5 um orless is 20% or less based ona total
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`area of the protective layer, and the standard deviation o of the thickness distribution of the
`
`protective layer is 50% or less relative to an average thickness of the protective layer.
`
`11. (Previously Presented) The secondary battery according to claim 1, wherein the protective
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`layer has a porosity of 30% or more and 60% orless.
`
`
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